コード例 #1
0
ファイル: rte_malloc.c プロジェクト: AMildner/MoonGen
/*
 * Resize allocated memory.
 */
void *
rte_realloc(void *ptr, size_t size, unsigned align)
{
	if (ptr == NULL)
		return rte_malloc(NULL, size, align);

	struct malloc_elem *elem = malloc_elem_from_data(ptr);
	if (elem == NULL)
		rte_panic("Fatal error: memory corruption detected\n");

	size = CACHE_LINE_ROUNDUP(size), align = CACHE_LINE_ROUNDUP(align);
	/* check alignment matches first, and if ok, see if we can resize block */
	if (RTE_PTR_ALIGN(ptr,align) == ptr &&
			malloc_elem_resize(elem, size) == 0)
		return ptr;

	/* either alignment is off, or we have no room to expand,
	 * so move data. */
	void *new_ptr = rte_malloc(NULL, size, align);
	if (new_ptr == NULL)
		return NULL;
	const unsigned old_size = elem->size - MALLOC_ELEM_OVERHEAD;
	rte_memcpy(new_ptr, ptr, old_size < size ? old_size : size);
	rte_free(ptr);

	return new_ptr;
}
コード例 #2
0
ファイル: rte_malloc.c プロジェクト: AMildner/MoonGen
/*
 * Return the physical address of a virtual address obtained through rte_malloc
 */
phys_addr_t
rte_malloc_virt2phy(const void *addr)
{
	const struct malloc_elem *elem = malloc_elem_from_data(addr);
	if (elem == NULL)
		return 0;
	return elem->mz->phys_addr + ((uintptr_t)addr - (uintptr_t)elem->mz->addr);
}
コード例 #3
0
ファイル: rte_malloc.c プロジェクト: AMildner/MoonGen
int
rte_malloc_validate(const void *ptr, size_t *size)
{
	const struct malloc_elem *elem = malloc_elem_from_data(ptr);
	if (!malloc_elem_cookies_ok(elem))
		return -1;
	if (size != NULL)
		*size = elem->size - elem->pad - MALLOC_ELEM_OVERHEAD;
	return 0;
}
コード例 #4
0
ファイル: eal_common_memzone.c プロジェクト: ANLAB-KAIST/dpdk
static const struct rte_memzone *
memzone_reserve_aligned_thread_unsafe(const char *name, size_t len,
		int socket_id, unsigned flags, unsigned align, unsigned bound)
{
	struct rte_memzone *mz;
	struct rte_mem_config *mcfg;
	size_t requested_len;
	int socket, i;

	/* get pointer to global configuration */
	mcfg = rte_eal_get_configuration()->mem_config;

	/* no more room in config */
	if (mcfg->memzone_cnt >= RTE_MAX_MEMZONE) {
		RTE_LOG(ERR, EAL, "%s(): No more room in config\n", __func__);
		rte_errno = ENOSPC;
		return NULL;
	}

	/* zone already exist */
	if ((memzone_lookup_thread_unsafe(name)) != NULL) {
		RTE_LOG(DEBUG, EAL, "%s(): memzone <%s> already exists\n",
			__func__, name);
		rte_errno = EEXIST;
		return NULL;
	}

	if (strlen(name) >= sizeof(mz->name) - 1) {
		RTE_LOG(DEBUG, EAL, "%s(): memzone <%s>: name too long\n",
			__func__, name);
		rte_errno = EEXIST;
		return NULL;
	}

	/* if alignment is not a power of two */
	if (align && !rte_is_power_of_2(align)) {
		RTE_LOG(ERR, EAL, "%s(): Invalid alignment: %u\n", __func__,
				align);
		rte_errno = EINVAL;
		return NULL;
	}

	/* alignment less than cache size is not allowed */
	if (align < RTE_CACHE_LINE_SIZE)
		align = RTE_CACHE_LINE_SIZE;

	/* align length on cache boundary. Check for overflow before doing so */
	if (len > SIZE_MAX - RTE_CACHE_LINE_MASK) {
		rte_errno = EINVAL; /* requested size too big */
		return NULL;
	}

	len += RTE_CACHE_LINE_MASK;
	len &= ~((size_t) RTE_CACHE_LINE_MASK);

	/* save minimal requested  length */
	requested_len = RTE_MAX((size_t)RTE_CACHE_LINE_SIZE,  len);

	/* check that boundary condition is valid */
	if (bound != 0 && (requested_len > bound || !rte_is_power_of_2(bound))) {
		rte_errno = EINVAL;
		return NULL;
	}

	if ((socket_id != SOCKET_ID_ANY) && (socket_id >= RTE_MAX_NUMA_NODES)) {
		rte_errno = EINVAL;
		return NULL;
	}

	if (!rte_eal_has_hugepages())
		socket_id = SOCKET_ID_ANY;

	if (len == 0) {
		if (bound != 0)
			requested_len = bound;
		else {
			requested_len = find_heap_max_free_elem(&socket_id, align);
			if (requested_len == 0) {
				rte_errno = ENOMEM;
				return NULL;
			}
		}
	}

	if (socket_id == SOCKET_ID_ANY)
		socket = malloc_get_numa_socket();
	else
		socket = socket_id;

	/* allocate memory on heap */
	void *mz_addr = malloc_heap_alloc(&mcfg->malloc_heaps[socket], NULL,
			requested_len, flags, align, bound);

	if ((mz_addr == NULL) && (socket_id == SOCKET_ID_ANY)) {
		/* try other heaps */
		for (i = 0; i < RTE_MAX_NUMA_NODES; i++) {
			if (socket == i)
				continue;

			mz_addr = malloc_heap_alloc(&mcfg->malloc_heaps[i],
					NULL, requested_len, flags, align, bound);
			if (mz_addr != NULL)
				break;
		}
	}

	if (mz_addr == NULL) {
		rte_errno = ENOMEM;
		return NULL;
	}

	const struct malloc_elem *elem = malloc_elem_from_data(mz_addr);

	/* fill the zone in config */
	mz = get_next_free_memzone();

	if (mz == NULL) {
		RTE_LOG(ERR, EAL, "%s(): Cannot find free memzone but there is room "
				"in config!\n", __func__);
		rte_errno = ENOSPC;
		return NULL;
	}

	mcfg->memzone_cnt++;
	snprintf(mz->name, sizeof(mz->name), "%s", name);
	mz->phys_addr = rte_malloc_virt2phy(mz_addr);
	mz->addr = mz_addr;
	mz->len = (requested_len == 0 ? elem->size : requested_len);
	mz->hugepage_sz = elem->ms->hugepage_sz;
	mz->socket_id = elem->ms->socket_id;
	mz->flags = 0;
	mz->memseg_id = elem->ms - rte_eal_get_configuration()->mem_config->memseg;

	return mz;
}
コード例 #5
0
ファイル: rte_malloc.c プロジェクト: AMildner/MoonGen
/* Free the memory space back to heap */
void rte_free(void *addr)
{
	if (addr == NULL) return;
	if (malloc_elem_free(malloc_elem_from_data(addr)) < 0)
		rte_panic("Fatal error: Invalid memory\n");
}